internal/frontend: link to new CVE website

CVEs in vulnerability pages now link to the new MITRE CVE website,
(www.cve.org), instead of the old one (cve.mitre.org).

Change-Id: I98b0e1ad62bad79d6457cb52bd323e1c282ec23a
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/459557
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Tatiana Bradley <tatiana@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jamal Carvalho <jamal@golang.org>
diff --git a/internal/frontend/vulns.go b/internal/frontend/vulns.go
index 90aad1a..60a0dc6 100644
--- a/internal/frontend/vulns.go
+++ b/internal/frontend/vulns.go
@@ -20,7 +20,7 @@
 
 const (
 	githubAdvisoryUrlPrefix = "https://github.com/advisories/"
-	mitreAdvisoryUrlPrefix  = "https://cve.mitre.org/cgi-bin/cvename.cgi?name="
+	mitreAdvisoryUrlPrefix  = "https://www.cve.org/CVERecord?id="
 	nistAdvisoryUrlPrefix   = "https://nvd.nist.gov/vuln/detail/"
 )